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# Can i use a laptop charger whose input and output ampers are higher than my original charger? Answered

My original laptop charger is not working can i use New charger whose input is 100-240v-2.4a (2.4a) 50-60hz and output 20v(20v)== 4.5a(4.5a) insted of my original cahrger whose input was 100-240v~1.7a 50-60hz and output was 20v(20v) == 3.24a(3.24a). As you see there is difference in input and output ampers

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When you go shopping for a new charger, you want to pick one with the
same voltage spec, but the current spec can be greater or equal to that of the old one.

The charger is a constant voltage supply, and the spec printed on it for current is a maximum value.

The charger expects the device plugged into it, to determine the current, and that current can be any number less than the maximum current it can supply.

For example, a charger with voltage 20 VDC, and max current of 4.5 A, should be happy supplying:

20 volts at 4.5 amperes,

or 20 volts at 4.0 amperes,

or 20 volts at 3.24 amperes (the maxium current for the old charger),

or 20 volts at 3.0 amperes,

or 20 volts at 2.0 amperes,

or 20 volts at 0.5 amperes,

or 20 volts at 0 amperes (when no load is plugged into it),

or 20 volts at J amperes (where J is any number between 0 and 4.5 A)

better ... than original : A - OK